Compressive Strength Target Method for Optimal Zero Carbon Concrete Mixtures Synthesized from Fly Ash

Abstract

Zero Carbon Concrete (ZCC) mix design and material proportioning are complex when compared to normal concrete due to the numerous variables involved in the design process of ZCC mixtures. Despite the fact that the published experimental data related to the design and proportioning of ZCC ingredients, the lack of standards of practice hinders its general implementation. Design mixture and mixing procedure were mostly according to a trial-and-error method. Thus, this research aims to investigate the impact of Molarity concentration and ratio of (Sodium Silicate (SS)), which is called R ratio, on the strength of ZCC manufactured from low Calcium fly ash (FA) Class F. Design of Experiment (DOE) was employed using MINITAB program for test, statistical and analysis of variance (ANOVA) purposes. The finding of the current study proved that increasing the R ratio led to improving the strength. It was found that the optimum R ratio was 2.5. Furthermore, the values of NaOH Molarity effected significantly the strength of ZCC.